Abstract
This paper presents the results of industrial tests on dust deposition due to the use of an unsteady gas flow. JSC SUMZ (Revda) applied the technology with the use of acoustic radiators to organize in-furnace dust deposition at Vanyukov furnace. The design of the radiator included a nozzle pipe, air nozzle, resonator and focusing surface. Based on the surface area of the furnace molten pool and recommended specific acoustic power values for in-furnace dust condensing, the total acoustic field sound power was calculated. The optimal number and location of acoustic radiators was determined. The analysis of the data of industrial tests of the use of the acoustic field energy in the working space of the PZhV, as well as the results of tests on the converter No. 2 of JSC ‘SUMZ’, the cyclone of the firing multi-hearth furnace of JSC ‘SVYATOGOR’, the dust chamber of the Waelz furnace and cleaning of the heat exchange surfaces of the boiler on waste gases (JSC ‘Chelyabinsk Zinc Plant’).
Highlights
Thermal performance of the majority of process units using disperse materials of various fineness or processing of supernatant liquid is characterized by the formation of a significant amount of dust particles of various grain fineness, their sticking to the inner surface of gas ducts and furnace elements with limited kinetics of the main physical and chemical processes
Research of ways to reduce dust emission from layered technological units One of the most rational ways to reduce dust discharge from the layered process units is to improve the conditions of dust-laden flow movement at all technological stages in order to optimize the gasdynamic situation in the working compartment
At the same time, captured dust particles increase the amount of materials involved in technological processes, increasing their performance and reducing the amount of thermal losses with exit gases
Summary
Thermal performance of the majority of process units using disperse materials of various fineness or processing of supernatant liquid is characterized by the formation of a significant (up to 200–250 g/m3) amount of dust particles of various grain fineness, their sticking to the inner surface of gas ducts and furnace elements with limited kinetics of the main physical and chemical processes. In order to reduce losses of initial and finite materials and to improve the environmental situation in the area of the enterprise location on the way of dusty gases movement a number of dust-arresting equipment (dust chamber, cyclone unit, electrostatic precipitator) are installed in series. Despite their relatively high capture efficiency factor, the content of dust particles in the exit gases remains high.
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